93 pickup need help asap !!! Please !!!!
#1
93 pickup need help asap !!! Please !!!!
First of all im new to the forum thanks for having me ! I have a serious issue with my truck its a 93 pickup 4cyl 5spd and it has a idle and acceleration problem big time !!!! Mostly at idle and around 2000 rpms its like not even drive able and its my DD!!! Here are some thing ive tried/replaced
Fuel pump
Fuel filter
Open circuit relay
Have tried 2 differnet computer
Have tried 2different afm
Have replaced tps (not 100% the adjust is correct)
Head gasket
Coolant temp sensor
Vaccum leaks
Trottle body cleaned
Valves adjusted
Cap
Rotor
Plugs an wires
Coil
Cleaned injectors and changed orings
Fuel pressure regulator
Checked ground but im missing the one on the power steerin mount any pics or info on that ??? Where it comes from what color it is ?
Im sure im missing some stuff but im lost and really need this truck to run any ideas help please ??? I seriously will paypal someone money if they can pin point my problem
Thanks stan. If you got time give me a call or text and we can try to figure it out it 321-356-0889
Fuel pump
Fuel filter
Open circuit relay
Have tried 2 differnet computer
Have tried 2different afm
Have replaced tps (not 100% the adjust is correct)
Head gasket
Coolant temp sensor
Vaccum leaks
Trottle body cleaned
Valves adjusted
Cap
Rotor
Plugs an wires
Coil
Cleaned injectors and changed orings
Fuel pressure regulator
Checked ground but im missing the one on the power steerin mount any pics or info on that ??? Where it comes from what color it is ?
Im sure im missing some stuff but im lost and really need this truck to run any ideas help please ??? I seriously will paypal someone money if they can pin point my problem
Thanks stan. If you got time give me a call or text and we can try to figure it out it 321-356-0889
#6
O2 sensor was the wire it in your self type
Idle idle screw does nothing and no codes the only 2 recent codes were afm and tps wihich i tried 2 diffenert afm and have a brand new tps i got yesterday anyone walk me threw the steps on adjusting it ? I tried looking at 4 wheel crawlings link and its really confusing
And at idle it barly runs at all like its running out of gas or missing and on acceration it acts like its running on fumes jerking and kicking and hopping but if its around 3000-5000 it will run like a champ free reving or driving ??? It started as a little miss or stumble now going even more down hill
Idle idle screw does nothing and no codes the only 2 recent codes were afm and tps wihich i tried 2 diffenert afm and have a brand new tps i got yesterday anyone walk me threw the steps on adjusting it ? I tried looking at 4 wheel crawlings link and its really confusing
And at idle it barly runs at all like its running out of gas or missing and on acceration it acts like its running on fumes jerking and kicking and hopping but if its around 3000-5000 it will run like a champ free reving or driving ??? It started as a little miss or stumble now going even more down hill
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#9
Registered User
iTrader: (1)
If you're not sure your TPS is set correctly, I'd start with making sure that's right before you go chasing another possible phantom. Unplug the TPS. Did anything change?
Without having the specs for your particular model/TPS in front of me, it's hard to walk you thru it. You have to get all the different readings within range and on some of them you have to use feeler gauges between the throttle stop screw and plate. OH, make sure you're throttle stop screw is set right first! Loosen the locking nut on it and back off the screw until it's not touching the stop plate anymore. Then screw it back in until it just touches the plate. After that, give it another 1/4 turn in and then set the locking nut in place. You may already know that, but it's easier to go ahead and tell you than for you to have to ask and then wait for another answer if you don't already know.
Without having the specs for your particular model/TPS in front of me, it's hard to walk you thru it. You have to get all the different readings within range and on some of them you have to use feeler gauges between the throttle stop screw and plate. OH, make sure you're throttle stop screw is set right first! Loosen the locking nut on it and back off the screw until it's not touching the stop plate anymore. Then screw it back in until it just touches the plate. After that, give it another 1/4 turn in and then set the locking nut in place. You may already know that, but it's easier to go ahead and tell you than for you to have to ask and then wait for another answer if you don't already know.
Last edited by SPARKS89; 07-03-2013 at 09:22 AM.
#10
Ive done the idle stop screw adjustment and when i unplug it it idles worse. Rpms drop a couple humdred. I understand you put the feeler gauage in between the throttle plat and idle stop screw but what size gauage is it ? And i have all the measurements and number written down so i know which connections to test and what the out come should be.
Thanks for the reply!
Thanks for the reply!
#12
Registered User
when you say the idle screw does nothing, it makes me wonder if the o ring around screw is cut or broken. pull the screw all the way out and inspect the oring
#13
What i ment to say is it doesnt help it dose idle it up and down but i pulled it anyways its there looks alittle flattened but no rips im pulling the valve cover to check/readjust valve now and also gonna do another compression test
#14
Registered User
iTrader: (1)
Ive done the idle stop screw adjustment and when i unplug it it idles worse. Rpms drop a couple humdred. I understand you put the feeler gauage in between the throttle plat and idle stop screw but what size gauage is it ? And i have all the measurements and number written down so i know which connections to test and what the out come should be.
Thanks for the reply!
Thanks for the reply!
#15
http://www.lcengineering.com/LCTechP...Adjustment.pdf
This is the info i used to do the tps setting
Here are the results
Test 1 0.53
Test 2. 0.02
Test 3. 0.02
Test 4. 4.76
Test 5. 6.12.
Sound like i got it ? I know test two should be infint/open but thats about the closest i got it
I also just readjusted the valves and checked toming again timing is good its were its always been. Valves didnt help just made it alittle quieter.
This is the info i used to do the tps setting
Here are the results
Test 1 0.53
Test 2. 0.02
Test 3. 0.02
Test 4. 4.76
Test 5. 6.12.
Sound like i got it ? I know test two should be infint/open but thats about the closest i got it
I also just readjusted the valves and checked toming again timing is good its were its always been. Valves didnt help just made it alittle quieter.
#16
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Setting Idl-E2 to open when the throttle is open "a little" (arbitrarily, 0.80mm) is actually the only adjustment there is. (the other "tests" are just to verify the TPS is not completely wrecked.) So yours is not adjusted.
With your meter reading kohms, you want Idl-E2 to be shorted (your 0.020 kohms is fine; anything less than 2.3 kohms is considered to be shorted for purposes of this test) when the throttle is closed, open when the throttle is opened. That's all there is to it.